<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <link rel="stylesheet" href="./assets/lib/cropper/cropper.css" />
    <style>
        .container {
            float: left;
            width: 600px;
            height: 500px;
        }

        .w200 {
            width: 200px;
            height: 200px;
        }

        .w100 {
            width: 100px;
            height: 100px;
        }

        .w50 {
            width: 50px;
            height: 50px;
        }

        .w30 {
            width: 30px;
            height: 30px;
        }

        .preview {
            background-color: #ccc;
            margin: 10px;
            /* 预览的图片溢出部分隐藏 */
            overflow: hidden;
        }
    </style>
</head>

<body>

    <div class="container">
        <img src="./assets/images/sample.jpg" alt="">
    </div>
    <div class="preview_box">
        <div class="preview w200"></div>
        <div class="preview w100"></div>
        <div class="preview w50"></div>
        <div class="preview w30"></div>
    </div>
    <script src="./assets/lib/jquery.js"></script>
    <script src="./assets/lib/cropper/Cropper.js"></script>
    <script src="./assets/lib/cropper/jquery-cropper.js"></script>
    <script>
        let $image = $(".container img");

        // 1.2 配置选项
        let options = {
            // 纵横比
            aspectRatio: 1,
            preview: ".preview",
        };

        // 1.3 创建裁剪区域
        $image.cropper(options)
        
    </script>
</body>

</html>